Making double-cone socket joints



March 3, 1931. *H; INDEN 4 1,7 4,407

MAKING DdUBLE cons SOCKET JOINTS Filed Sept. 7, 1928 2 Sheets-Sheet 1 IILIZENTOR. f/ubri jhdeiz ATTOR EY March '3, 1931.

MAKING DOUBLE'CONE SOCKET JOINTS Filed Sept. 7, 192's 2 Sheets-Sheet 2 V ATTORNEY H. INDEN l 1,794,407

Patented Mar. 3, real 7 '1 1 794 407 Uni-ran stares ear-si ar HUBERT ENDEN, OFD JSSELDORF, GER-MANY MAKING DOUBLE-GONE SOCKET JOINTS Application filed September 7, 1928, Serial No. 304,481, and in Germany May 4, 1928.

Object of the invention is a device which stead of the screw-cutting devices 7, 8, 13, 14 renders it possible to turn or thread doubleshown in the drawings, a turning orboring couplings or socket-joints, as used, erg. in condevice similar to the screw-cutting devices junction with deep-boring tools (augers, except for the form of the cutters, may be wimbles), upon an ordinary lathe, without placed in positionbetween the centres 1, 2 55 the necessity of resetting the socket. The after removing the screw-cutting devices. device also makes possible the adjustment of Thecoupling 22 to be provided with screwthe chasers'to vary the thread-diameter. thread is clamped in a lathe-chuck connected I The accompanying drawing shows the new with the head stock t by means of the arm 22.

" device in' The tightening ofthe gripping jaws is ef- 60 Figs. land 2 attached to an ordinary lathe, footed, e. g. by turning to the righta screwwhilst cap 25, to cause the conical wedge jaws 24 Fig. 3 represents an enlarged longitudinal to engage the conical surface of a chuck.

. section of the new device and a part of the The modus operandi is now as follows:

' lathe; The coupling 22 to be worked is clamped 65 Figs. 4-6illustrate details of the device. in the lathe-chuck and first turned, which is Upon an ordinary lathe 6 the shaft 3 is effected by means oi a turning tool of the placed between the centre 1 in the head-stock I character described. The manner of work- 1 and the centre line 2 on the tail-stock 5. ing of the turning device ispractically iden- Upon the shaft-3 two conical cam sleeves? and tical with the 'inodus operandi described Sare adjustably disposed. The sleevesZandS when cutting the-thread, for which reason have their conical portions provided with only the latter operation will be specifically an annular series of slots 9, 10 in such described. Forthc purposeot ensuring that I, a manner, that fingers or tongues 11, 12, the coupling 22, when placed in position, will arranged in each series in alternation with always occupy the same position in an axial 75 the slots, are formed. The fingers and slots direction, the coupling 22 is pushedright up are o i-like width with the result, that the against the interchangeable or adjustable slotted and fingered portions of thesleeves stop or abutment 27. The screw-cutting de- 7, 8 may be telescopicallyv engaged. The vice isnow placed'in the positionrepresented outer'cylindrical end of the conical sleeve in F 3. The chasers 13 are thereby 80 7 and its tongues 11 serve for supporting brought to bear against the highest portions a set of chasers or cutters 13, Whereas the of the cam surfaces of the conical tongues cylindrical end of the sleeve 8 and the 11, whilst the chasers 14: are brought to bear. tongues 12 serve for supporting a set of against the lowest portions of the cam sur- 5 chasers or cutters 1 1. The sets of chasers faces of the conical tongues 12. The right 8 are radially adjustable in accurately milled end of the cylindrical socket 16 which has now slots 15 in a cylindrical holding sleeve 16 been pushed to the right as far as it will go, made to fit the cylindrical parts of the sleeves carries abearing bracket 28,1irmly connected 7, 8; The chasers are prevented from dropwithit, which is attached to the upper ping out by means of helical draw-springs 17 part29 of the slide-carriage 30. Upon setengaging notches therein, and whereby the tingthe lathe into action, the head stock rechasers 13, 14 are held pressed against the volves and with it the coupling to be procylindrical end portions or the tongues of the vided with screw-threads. Meanwhile the sleeves7, 8. The sleeve 16 is prevented from slide-carriage 30 is drawn to the left in the turning independently of the sleeves 7, 8 by usual manner by means of the threaded drive means of the two screws 18, 19 which engage spindle 31 o f the lathe 6, the threads of slots 20, 21 in the sleeve 16 and permit adj ustwhich correspond in pitch to the pitch of ment of the sleeves 7, 8 in an axial direction the screw threads to be formed on the couso that couplings of differentilengths and dipling. Chasers 13 will thereby be pushed inameters may be operated upon thereby. Inwards and the chaser-s 1d outwards 111 this way the double-cone threads will be cut, accurately in accordance with the shape of the cones 11, 12. Once the device has been properly and correctly adjusted, which can very easily be attained by means of the screws l8, 19, by axially displacing the two cones, the couplings turned out will be of absolute uniformity, without requiring special skill on the part of the operator. After the screw-cutting of the coupling has been completed, the coupling removed and another applied in its place.

The turning or drilling of the double cone socket is effected with another drilling-tool, which is ofthe same design, as the one previously described, with the only difference, that in place of thread cutters turning cutters of suitable type will be used. In contra-distinction to the modus operandi previously .described, the sleeve 16 need not be displaced from the right to the left by the guide-spindle 31, but the displacement may be effected in the direction from left to right by the guidespindle of the lathe which in this case will act as feed shaft. After the turning operation has been completed, the operator, by employing this modus operandi, is able to detach the turning device and to place the screwcutting device in position, without the necessity of loosening the lathe-chuck. t is therefore possible, without resetting the coupling, to provide the turned coupling with screwthreads by the use of the previously described screw-cutting device. In this way it is possible to turn out nicely finished couplings more economically than before by means of unskilled labor.

What I claim is: r

1. A device for use in turning or threading double conical couplings upon an ordinary lathe, comprising a shaft adapted to be held between the head and the tail stocks of the lathe, two reversely arranged cam members of conical shape situateo upon said shaft, cutting tools radially adjustable by said cam members, means for moving the cutting tools in an axial directionalong said cam members, and a hollow support having means of attachment to the lathe and adapted to support the coupling so as to be acted uponby the cut-1 ting tools.

2. A device for use in turning or thread ing double conical couplings upon an ordinary-lathe, comprising a shaft adapted to be held between the head stock and the tail stock of the lathe, a hollow chuck having means for attaching it to the lathe coaxially with the shaft for holding the coupling in position, two reversely arranged cam sleeves external- 1 ly of'conical shape situated upon said shaft and adjustable with relation to each other along the latter and having telescoping tongues, cutting tools radially adjustable by said tongues, and means for feeding the cutting tools in an axial direction and holding the cam sleeves from'independent rotation on the shaft, whereby said cutting tools successively operate upon the cone portions of the coupling.

3. A device for use in turning or threading double conical couplings upon an ordinary lathe, comprising a shaft adapted to be held between the head stock and the tail stock of the lathe, a sleeve attached to the face-plate of the lathe coaxially with said shaft, a chuck carried by said sleeve for holding the coupling, two relatively adjustable reversely arranged cam members externally of conical shape the taper of which corresponds to that of the completed socket and having telescopically engaging tongues, cutting tools resting on and radially adjusted by said tongues, an annular spring pressing said cutters against the tongues, and a sleeve carrying the cutters and attached to and movable with the slide carriage of the lathe.

i. A device for use in turning or threading double conical couplings upon an ordinary comprising a shaft adapted to be held between the head stock and the tail stock of the lathe, a sleeve attached to a" fixed part of the lathe coaxially with the shaft, a chuck carried thereby ior holding the coupling, two relatively adjustable reversely arranged cam sleeves externally of conical shape mounted on said shaft, having telescoping taperec tongues the taper of which corresponds to that of the tapered portions of the coupling, resiliently pressed cutting tools resting on and radially adjustable by said tongues, a

sleeve within which the tools are arranged 

